E-Print Archive

There are 4172 abstracts currently viewable.


Search:

Advanced Search
Options
Main Page Add New E-Print Submitter
Information
Feedback
News Help/FAQ About Preferences
Manage Key Phrase
Notification
The Distribution of Time Delays Between Nanoflares in Magnetohydrodynamic Simulations View all abstracts by submitter

Jeffrey Reep   Submitted: 2020-02-13 08:53

Nanoflares are thought to be an important energy source for heating the solar corona. The exact amount of heating contributed by nanoflares depends, in part, on the frequency of the heating and the time interval between nanoflares. Several numerical models have attempted to constrain the frequency of the heating by fitting to observed emission measures. To date, however, no physically motivated value for the time interval between nanoflares has been obtained. In this paper, we calculate a physically motivated distribution of time intervals between successive "nanoflare" reconnection events in driven magnetohydrodynamic simulations. We show that this distribution follows a power law with a slope near -1, much shallower than previously inferred from observations and determined from loop model comparisons with observations. We show that the energy flux injected into the corona in our model is of order 107 erg/cm2/s, and that the heating rate due to these reconnection events reaches values of order 1 - 10 erg/cm^3/s. Additionally, we show that this power law slope is dependent only weakly on the amount of magnetic helicity injected into the solar magnetic field by the photospheric motions, but the rate of reconnection is about 45% higher if no magnetic helicity is injected.

Authors: Kalman J. Knizhnik & Jeffrey W. Reep
Projects: None

Publication Status: Published in Solar Physics
Last Modified: 2020-02-13 11:50
Go to main E-Print page  Data-driven MHD Simulation of the Formation and Initiation of a Large-scale Pre-flare Magnetic Flux Rope in Solar Active Region 12371  Edit Entry  Download Preprint  Delete Entry 

Key
Go to main E-Print pageGo to main E-Print page.
Previous AbstractPrevious Abstract.
Next AbstractNext Abstract.
Download PreprintDownload Preprint.
Submitter's HomepageSubmitters Homepage.
Edit EntryEdit Entry.
View All Abstracts By SubmitterView all abstracts by submitter.
Delete AbstractDelete abstract.

Latest Entries
The Distribution of Time Delays Between Nanoflares in Magnetohydrodynamic Simulations
Data-driven MHD Simulation of the Formation and Initiation of a Large-scale Pre-flare Magnetic Flux Rope in Solar Active Region 12371
NVST observations of collision-induced apparent fan-shaped jets
Cosmic ray interactions in the solar atmosphere
A correlation in the waiting-time distributions of solar flares
Alternative Models of Zebra Patterns in the Event on June 21, 2011
Torsional slow-mode oscillations discovered in the magnetic free energy during solar flares
Particle acceleration in coalescent and squashed magnetic islands II. Particle-In-cell approach
The time step constraint in radiation hydrodynamics
Continuous Null-Point Magnetic Reconnection Builds Up a Torus Unstable Magnetic Flux Rope Triggering the X9.3 Flare in Solar Active Region~12673
A Comparison of Flare Forecasting Methods. IV. Evaluating Consecutive-Day Forecasting Patterns
The New 2018 Version of the Meudon Spectroheliograph
Longitudinal filament oscillations enhanced by two C-class flares
Spatio-temporal energy partitioning in a non-thermally dominated two-loop solar flare
Meteospace, a New Instrument for Solar Survey at the Calern Observatory
Correcting the effect of magnetic tongues on the tilt angle of bipolar active regions
Hi-C 2.1 Observations of Jetlet-like Events at Edges of Solar Magnetic Network Lanes
Fine-scale Explosive Energy Release at Sites of Prospective Magnetic Flux Cancellation in the Core of the Solar Active Region Observed by Hi-C 2.1, IRIS, and SDO
Remote coronal dimmings related to a circular-ribbon flare
Formation and Eruption of a Mini-sigmoid Originating in Coronal Hole

Related Pages
MSU Solar Physics.
Max Millennium Science Mail Archive.
Max Millennium Message of the Day Mail Archive.
Max Millennium Flare Catalog

Archive Maintainer
Alisdair Davey



© 2003 Solar Physics Group - Montana State University